Joe Jackson 'Proud' to Have Michael's Kids at the Grammys

From left: Paris, Prince and Blanket Jackson at father Michael Jackson's memorial in 2009

Mark J. Terrill/AP

01/30/2010 AT 04:00 PM EST

As the Grammy Awards prepare to honor the late King of Pop with a Lifetime Achievement Award, Joe Jackson says he is happy to have his grandchildren accept the award on his son's behalf.

Michael Jackson's two eldest children, Paris, 11, and Prince Michael, 12, are scheduled to take the stage at Sunday's telecast.

"I am very proud that my son, Michael Jackson, is a recipient of a Lifetime Achievement Award at this year's Grammy," Joe Jackson said in a statement Saturday. "However, there [have] been some recent rumors that I am displeased with the idea that Michael's children are accepting the award on my son's behalf. On the contrary, I am very proud of my grandchildren. Katherine and I are the ones that [have] initiated their participation."

"I thank the Recording Academy for their honor and know that Michael would have been very pleased to receive such recognition," Joe Jackson continued. "I am very proud of my family and I will continue to seek justice for my son."

Watch the 52nd Annual Grammy Awards on Jan. 31 at 8 p.m. ET/PT, live on CBS – and catch up on all the news and style from the show on PEOPLE.com!